CN111730371A - A tool holder with anti-pinch function for CNC machine tools - Google Patents

Abstract

The invention discloses a tool holder with an anti-pinch function for a numerically controlled machine tool, comprising a lower tool holder, an upper tool holder and a bolt handwheel. The upper surface and the rear surface of the lower tool rest are provided with cooling channels, the cooling channels of the upper tool rest and the lower tool rest are communicated, and the outer surface of the top end of the lower tool rest is fixedly connected with a bonding layer, and the first tapered The gears are located inside the upper tool holder. The CNC machine tool uses a tool holder with anti-pinch function. When the bolt handwheel is tightened, the tool will be squeezed. However, because the connecting layer on the bolt handwheel is made of silicone rubber material, the silicone rubber material has high flexibility. It can increase the friction between the bolt handwheel and the tool, but the hardness is smaller than that of the tool, so the tool will not be pinched, and the bonding layer is made of copper material, and the hardness of the copper material is also smaller than that of the tool. , effectively protect the tool.

Description

A tool holder with anti-pinch function for CNC machine tools

technical field

The invention relates to the related technical field of numerically-controlled machine tools, in particular to a tool holder with an anti-pinch function for numerically-controlled machine tools.

Background technique

CNC machine tool is a kind of equipment that is very common in industrial production, mold production and some mechanical production, such as CNC lathes, CNC milling machines and CNC machining centers, etc., and tool holders are specially used for placing tools in these machines. Material, the tool is fixed by the tool holder, which is convenient for processing the material by the tool, but the tool holder has some disadvantages:

First, as mentioned above, during machining, it is generally necessary to place the tool through the tool holder, and then lock the tool with bolts. However, because the tightening of the bolts is likely to directly cause damage to the outer surface of the tool, it is easy to cause the tool to be damaged. low stability;

Second, as mentioned in the first one, the tool needs to be fixed by tightening the bolts, but due to the large number of bolts, it needs to be tightened one by one, which is more troublesome;

Third, when the tool is fixed in the machining process, a lot of heat generated by friction will be transferred to the blade, but generally the cutting fluid is poured on the tool head, and the tool will be transferred by the tool head, which is easy to cause serious tool wear. , consume the service life.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a tool holder with anti-pinch function for CNC machine tools, so as to solve the problem of not having the anti-pinch function proposed by the above-mentioned background technology; it is inconvenient to gradually tighten the bolts for fixing; the tool is not heated during processing. Being cooled tends to reduce the lifespan.

In order to achieve the above purpose, the present invention provides the following technical solutions: a tool holder with an anti-pinch function for CNC machine tools, comprising a lower tool holder, an upper tool holder and a bolt handwheel, and the upper surface of the lower tool holder is connected with an upper tool holder. The tool holder, and the upper and rear surfaces of the upper tool holder and the lower tool holder are provided with cooling channels, the cooling channels of the upper tool holder and the lower tool holder are communicated, and the top outer surface of the lower tool holder is fixedly connected with a The top surface of the upper tool rest is penetrated by the connecting handwheel, and the outer surface of the connecting handwheel is connected with a driven gear, and the lower surface of the transmission gear is fixedly connected with a first bevel gear, and the first bevel The bevel gear is located inside the upper tool holder, and the lower surface of the first bevel gear is connected with a second bevel gear, the outer surface of the central axis of the second bevel gear is penetrated by the screw, and the end of the screw is fixedly connected with a fixed and the fixing block penetrates the inner surface of the middle end of the cooling channel, the top surface of the fixing block is fixedly connected with a support rod, and the top surface of the support rod is fixedly connected with a blocking block, and the blocking block penetrates the top inner surface of the cooling channel, The bottom surface of the fixed block is fixedly connected with a connecting chain, and the outer surface of the connecting chain is fixedly connected with a guide block, and the guide block is fixedly arranged inside the upper tool rest, and the end of the connecting chain is fixedly connected with a first magnetic block , and the end of the first magnetic block is fixedly connected with a square block, and the square block penetrates the outer surface of the upper tool holder, the outer surface of the first magnetic block is fixedly connected with a spring, and the spring is fixedly arranged inside the upper tool holder, The bottom surface of the bonding layer is fixedly connected with a heat-conducting rod, and the heat-conducting rod is located inside the lower tool holder. The end of the heat-conducting rod is fixedly connected with a metal ring, and the metal ring is fixedly connected to the outer surface of the cooling channel. A second magnetic block is fixed on the top surface of the lower tool rest, and the second magnetic block is located on one side of the first magnetic block.

Preferably, four connecting handwheels are distributed on the circumference of the center point of the top view of the upper tool holder, and the connecting handwheel and the upper tool holder form a rotating structure, and the transmission gear on the connecting handwheel and the driven gear are in meshing connection .

Preferably, there are five driven gears at equal intervals and are circumferentially distributed inside the upper tool rest, and a gear chain is connected to the outer surface of the driven gear, and the five driven gears are meshed with the gear chain.

Preferably, the outer surfaces of the driven gear and the upper tool rest are penetrated by a bolt handwheel, and a connection layer is fixedly connected to the bottom surface of the bolt handwheel.

Preferably, the bolt handwheel and the upper tool rest are threadedly connected, the bolt handwheel and the driven gear form an engaging sliding structure, and the connection layer on the bolt handwheel is made of silicone rubber material.

Preferably, the first bevel gear and the second bevel gear are meshed with the screw, and the screw and the upper cutter frame form a sliding structure.

Preferably, the fixing blocks are symmetrically distributed with respect to the longitudinal centerline of the upper tool holder, and the lengths of the fixing blocks and the blocking blocks are both greater than the radius of the cooling channel, and the fixing blocks and the blocking blocks form a sliding structure with the upper tool holder through the support rod.

Preferably, the outer surface of the connecting chain is in contact with the outer surface of the guide block, and the first magnetic block and the second magnetic block on the connecting chain form a same-sex repulsive structure, and the first magnetic block is connected to the upper knife structure through a spring into an elastic structure.

Preferably, the square blocks are equiangularly distributed with respect to the center point of the top view plane of the upper tool holder, and the square blocks and the upper tool holder form a sliding structure.

Preferably, the heat-conducting rod, the bonding layer and the metal ring are all copper-based materials, and the metal ring is spirally wound on the outer surface of the cooling channel.

Compared with the prior art, the beneficial effects of the present invention are: the CNC machine tool uses a tool holder with an anti-pinch function,

1. When the bolt handwheel is tightened, the tool will be squeezed, but since the connecting layer on the bolt handwheel is made of silicone rubber material, the silicone rubber material has high flexibility and strength, which can increase the bolt handwheel and The friction between the knives, but the hardness is smaller than the knives, so the knives will not be pinched, and the bonding layer is made of copper material, and the hardness of the copper material is also smaller than that of the knives, effectively protecting the knives;

2. When one of the connecting handwheels is rotated, the connecting handwheel will drive the transmission gear to rotate and mesh with the driven gear, driving the driven gear to drive the other 4 driven gears to rotate at one time through the gear chain, and let the driven gear drive one side. All the bolt handwheels are rotated and connected with the upper tool holder, so that the bolt handwheels slide down at the same time to squeeze the tool, saving time and improving efficiency;

3. Since the bonding layer, the heat-conducting rod and the metal ring are all copper materials, they have high thermal conductivity, which enables the connecting layer to absorb the heat of the tool and transmit it to the metal ring through the heat-conducting rod. When the cooling channel flows, it absorbs the heat of the metal ring wound on the cooling channel, so as to achieve the effect of cooling the tool and dissipating heat;

4. When the bolt handwheel is loosened, the fixed block will merge, so that the fixed block will relax to the connecting chain, and the first magnetic block on the connecting chain will be loosened. , the first magnetic block will push the square block to slide outward, so that the square block pushes the tool out, so as to achieve the effect of facilitating material reclaiming.

Description of drawings

Fig. 1 is the overall front sectional structure schematic diagram of the present invention;

Fig. 2 is the overall side sectional schematic diagram of the present invention;

3 is a schematic diagram of the overall rear cross-sectional structure of the present invention;

Fig. 4 is the overall top sectional structure schematic diagram of the present invention;

Fig. 5 is the top cross-sectional structural schematic diagram of the upper tool rest of the present invention;

Fig. 6 is the top sectional structural schematic diagram of the connection between the transmission gear and the driven gear of the present invention;

FIG. 7 is a schematic cross-sectional view of the connection side of the fixing block and the support rod according to the present invention.

In the picture: 1. Lower tool holder; 2. Upper tool holder; 3. Cooling channel; 4. Fitting layer; 5. Connecting handwheel; 6. Transmission gear; 7. Driven gear; 8. Gear chain; 9. Bolt handwheel; 10, connecting layer; 11, first bevel gear; 12, second bevel gear; 13, screw; 14, fixing block; 15, support rod; 16, blocking block; 17, connecting chain; 18 , guide block; 19, first magnetic block; 20, square block; 21, spring; 22, heat conduction rod; 23, metal ring; 24, second magnetic block.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-7, the present invention provides a technical solution: a tool holder with anti-pinch function for CNC machine tools, comprising a lower tool holder 1, an upper tool holder 2, a cooling channel 3, a bonding layer 4, a connection Hand wheel 5, transmission gear 6, driven gear 7, gear chain 8, bolt hand wheel 9, connecting layer 10, first bevel gear 11, second bevel gear 12, screw 13, fixing block 14, support rod 15 , blocking block 16, connecting chain 17, guide block 18, first magnetic block 19, square block 20, spring 21, heat-conducting rod 22, metal ring 23 and second magnetic block 24, the upper surface of the lower tool holder 1 is connected with an upper The tool holder 2, and the upper surface and the rear surface of the upper tool holder 2 and the lower tool holder 1 are provided with cooling channels 3, the cooling channels 3 of the upper tool holder 2 and the lower tool holder 1 are connected, and the top of the lower tool holder 1 is connected. The outer surface is fixedly connected with the bonding layer 4, the top surface of the upper tool holder 2 is penetrated by the connecting handwheel 5, and the outer surface of the connecting handwheel 5 is connected with a driven gear 7, and the lower surface of the transmission gear 6 is fixedly connected with a first. A bevel gear 11, and the first bevel gear 11 is located inside the upper tool holder 2, and the lower surface of the first bevel gear 11 is connected with a second bevel gear 12, the outer surface of the central axis of the second bevel gear 12 It is penetrated by the screw 13, and the end of the screw 13 is fixedly connected with a fixed block 14, and the fixed block 14 penetrates the inner surface of the middle end of the cooling channel 3, and the top surface of the fixed block 14 is fixedly connected with a support rod 15, and the top of the support rod 15 A blocking block 16 is fixedly connected to the surface, and the blocking block 16 penetrates the top inner surface of the cooling channel 3 , a connecting chain 17 is fixedly connected to the bottom surface of the fixed block 14 , and a guide block 18 is fixedly connected to the outer surface of the connecting chain 17 , and guide the The block 18 is fixedly arranged inside the upper tool rest 2 , the end of the connecting chain 17 is fixedly connected with a first magnetic block 19 , and the end of the first magnetic block 19 is fixedly connected with a square block 20 , and the square block 20 penetrates the upper tool rest 2 The outer surface of the first magnetic block 19 is fixedly connected with a spring 21, and the spring 21 is fixedly arranged inside the upper tool holder 2, and the bottom surface of the bonding layer 4 is fixedly connected with a heat-conducting rod 22, and the heat-conducting rod 22 is located in Inside the lower tool holder 1, the end of the heat-conducting rod 22 is fixedly connected with a metal ring 23, and the metal ring 23 is fixedly connected to the outer surface of the cooling channel 3, and the top surface of the lower tool holder 1 is fixedly provided with a second magnetic block 24, and The second magnetic block 24 is located on one side of the first magnetic block 19 .

There are four connecting handwheels 5 on the circumference of the center point of the top view of the upper tool rest 2, and the connecting handwheel 5 and the upper tool rest 2 form a rotating structure, and the driving gear 6 and the driven gear 7 on the connecting handwheel 5 are: In meshing connection, the connecting handwheel 5 can be rotated, so that the connecting handwheel 5 drives the transmission gear 6 to rotate, and the rotating transmission gear 6 meshes with the driven gear 7 to drive the driven gear 7 to rotate.

There are 5 driven gears 7 at equal intervals and are circumferentially distributed inside the upper tool holder 2, and the outer surface of the driven gear 7 is connected with a gear chain 8, and the five driven gears 7 are meshed with the gear chain 8. When the driven gear 7 rotates, it will mesh with the gear chain 8, so that the gear chain 8 drives the four driven gears 7 in the area to rotate at the same time.

Both the driven gear 7 and the outer surface of the upper tool rest 2 are penetrated by the bolt hand wheel 9, and the bottom surface of the bolt hand wheel 9 is fixedly connected with the connecting layer 10, the bolt hand wheel 9 and the upper tool rest 2 are threadedly connected, and the bolts The handwheel 9 and the driven gear 7 form an engaging sliding structure, and the connecting layer 10 on the bolted handwheel 9 is made of silicone rubber material. When the driven gear 7 rotates, it will drive the bolted handwheel 9 to rotate. Once the bolted handwheel 9 When it is rotated, it will be threadedly connected with the upper tool holder 2, so that the bolt handwheel 9 drives the connecting layer 10 to move downward while rotating, and squeezes the tool, but the connecting layer 10 is made of silicone rubber material, which has high resistance to Heat, strength and flexibility, with high friction, can increase the friction coefficient between the tool and the tool, and achieve the effect of effectively protecting the tool.

The first bevel gear 11 and the second bevel gear 12 are meshed with the screw 13, and the screw 13 and the upper tool rest 2 form a sliding structure, and when the transmission gear 6 rotates, it will drive the first bevel gear 11 to rotate at the same time , so that the first bevel gear 11 rotates and meshes with the second bevel gear 12 , the second bevel gear 12 will rotate and mesh with the screw 13 when it receives the meshing force, and the screw 13 is driven to push the fixed block 14 to slide.

The fixed blocks 14 are symmetrically distributed with respect to the longitudinal centerline of the upper tool rest 2, and the lengths of the fixed blocks 14 and the blocking blocks 16 are both greater than the radius of the cooling channel 3, and the fixed blocks 14 and the blocking blocks 16 are connected to the upper tool rest 2 through the support rod 15. A sliding structure is formed, when the fixed block 14 slides, the support rod 15 will be driven to move, so that the support rod 15 drives the blocking block 16 to slide, so as to achieve the effect that the blocking block 16 and the fixed block 14 both block the cooling channel 3, which can prevent the cooling channel 3. It is inconvenient to clean and cause clogging due to the iron filings entering when not processing at ordinary times.

The outer surface of the connecting chain 17 is in contact with the outer surface of the guide block 18 , and the first magnetic block 19 and the second magnetic block 24 on the connecting chain 17 form a repulsive structure of the same sex, and the first magnetic block 19 is connected to the upper surface through the spring 21 . The tool holder 2 constitutes an elastic structure. When the fixed block 14 slides, the connecting chain 17 will be pulled, so that the connecting chain 17 will pull the first magnetic block 19 through the guide block 18, and the first magnetic block 19 will compress the spring 21 for charging. And approaching the second magnetic block 24 , the repulsive force generated by the second magnetic block 24 and the first magnetic block 19 is gradually increased.

The square blocks 20 are equiangularly distributed with respect to the center point of the top view surface of the upper tool rest 2, and the square blocks 20 and the upper tool rest 2 form a sliding structure. When the first magnetic block 19 slides by pulling force, the first magnetic block 19 also passes through It will drive the square block 20 to slide up the inside of the tool holder 2, which is convenient for placing the tool.

The thermal conductive rod 22, the bonding layer 4 and the metal ring 23 are all copper materials, and the metal ring 23 is spirally wound on the outer surface of the cooling channel 3, because the thermal conductive rod 22, the bonding layer 4 and the metal ring 23 are all copper The thermal conductivity of the heat-conducting rod 22, the bonding layer 4 and the metal ring 23 are all high. The bonding layer 4 guides the heat of the tool to the heat-conducting rod 22, and then guides the heat to the metal ring 23 through the heat-conducting rod 22, while the metal ring The metal ring 23 is wrapped around the outer surface of the cooling channel 3, and when the cooling channel 3 passes through the cooling liquid, the metal ring 23 can be radiated to achieve the effect of cooling.

Working principle: When using the tool holder with anti-pinch function for the CNC machine tool, connect the external power supply to the device. According to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6 and Figure 7, first Press the tool against the square block 20 and the bonding layer 4 on the lower tool rest 1, and then rotate the connecting handwheel 5 of the upper tool rest 2, so that the connecting handwheel 5 drives the transmission gear 6 and the first bevel gear 11 to rotate, and the first A bevel gear 11 rotates and meshes with the second bevel gear 12, and the second bevel gear 12 rotates and meshes with the screw 13, so that the screw 13 pulls the fixing block 14 outward by the meshing force, and when the fixing block 14 is pulled, it will The blocking block 16 is pulled by the support rod 15, so that the blocking block 16 and the fixing block 14 both slide and no longer block the cooling channel 3, and when the fixing block 14 slides, the connecting chain 17 will be pulled, so that the connecting chain 17 passes through the guide block 18. When a magnetic block 19 is pulled, the first magnetic block 19 will drive the square block 20 to slide and retract into the upper tool holder 2 , and compress and charge the spring 21 . The repulsive force increases, because the square block 20 retracts to the inside of the upper tool rest 2, it can push the tool to approach the inner and outer sides of the upper tool rest 2, because the transmission gear 6 will mesh with the driven gear 7 when it rotates, and the driven gear 7 passes through The gear chain 8 drives all the driven gears 7 on one side to rotate, and the driven gear 7 drives the bolt handwheel 9 to rotate, so that the bolt handwheel 9 is threadedly connected with the upper tool holder 2, and the side rotates downward through the connecting layer 10 pair The placed knives are squeezed to achieve the effect that all the bolt handwheels 9 rotate downward at the same time to fix the knives and improve the efficiency;

During the turning process, according to FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 , FIG. 5 , FIG. 6 and FIG. 7 , the connection layer 10 of the copper material will absorb the heat generated by the tool turning process and transmit it through the heat conducting rod 22 . To the metal ring 23, the cooling liquid thrown away by the workpiece will splash into the cooling channel 3, so that the coolant flow in the cooling channel 3 absorbs and drives the heat of the metal ring 23 to achieve the effect of cooling and heat dissipation. , the handwheel 5 can be connected by rotating in the opposite direction. Similarly, the connecting handwheel 5 drives the transmission gear 6 to rotate and meshes with the driven gear 7. The driven gear 7 drives all the driven gears 7 to rotate through the gear chain 8, so that the driven gear 7 rotates. The bolt hand wheel 9 in the gear 7 rises and no longer clamps the tool, and the first bevel gear 11 also meshes with the second bevel gear 12, which drives the second bevel gear 12 to mesh with the screw 13, so that the screw 13 Push the fixing block 14 to reset and block the cooling channel 3 again. At the same time, the fixing block 14 relaxes the connecting chain 17, and the connecting chain 17 relaxes the first magnetic block 19 through the guide block 18. The first magnetic block 19 acts on the charged spring 21. The square block 20 is pushed by the repulsive force of the lower and second magnetic blocks 24 , so that the square block 20 pushes out the fitted tool to achieve the effect of taking the tool, which is more convenient and increases the overall practicability.

The content that is not described in detail in this specification belongs to the prior art known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still apply the foregoing implementations to those skilled in the art. Modifications to the technical solutions described in the examples, or equivalent replacement of some of its technical features, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. within.

Claims (10)

1. The utility model provides a digit control machine tool is with having knife rest of preventing pressing from both sides function of hindering, includes lower knife rest (1), upper knife rest (2) and bolt hand wheel (9), its characterized in that: the upper surface of the lower tool rest (1) is connected with an upper tool rest (2), the upper surfaces and the rear surfaces of the upper tool rest (2) and the lower tool rest (1) are respectively provided with a cooling channel (3), the upper tool rest (2) is communicated with the cooling channel (3) of the lower tool rest (1), the outer surface of the top end of the lower tool rest (1) is fixedly connected with an adhesive layer (4), the top surface of the upper tool rest (2) is penetrated by a connecting hand wheel (5), the outer surface of the connecting hand wheel (5) is connected with a driven gear (7), the lower surface of the transmission gear (6) is fixedly connected with a first conical gear (11), the first conical gear (11) is positioned in the upper tool rest (2), the lower surface of the first conical gear (11) is connected with a second conical gear (12), and the outer surface of the central axis of the first conical gear (12) is penetrated by a screw, the tail end of the screw rod (13) is fixedly connected with a fixed block (14), the fixed block (14) penetrates through the inner surface of the middle end of the cooling channel (3), the top surface of the fixed block (14) is fixedly connected with a supporting rod (15), the top surface of the supporting rod (15) is fixedly connected with a blocking block (16), the blocking block (16) penetrates through the inner surface of the top end of the cooling channel (3), the bottom surface of the fixed block (14) is fixedly connected with a connecting chain (17), the outer surface of the connecting chain (17) is fixedly connected with a guide block (18), the guide block (18) is fixedly arranged in the upper tool rest (2), the tail end of the connecting chain (17) is fixedly connected with a first magnetic block (19), the tail end of the first magnetic block (19) is fixedly connected with a square block (20), the square block (20) penetrates through the outer surface of the upper tool rest (2), and the outer surface of the first magnetic block (19) is, and spring (21) is fixed to be set up in the inside of top rest (2), the basal surface fixedly connected with heat conduction stick (22) of laminating layer (4), and heat conduction stick (22) are located the inside of bottom rest (1), the terminal fixedly connected with metal loop (23) of heat conduction stick (22), and metal loop (23) fixed connection is at the surface of cooling channel (3), the fixed second magnetic force piece (24) that is provided with in top surface of bottom rest (1), and second magnetic force piece (24) are located one side of first magnetic force piece (19).

2. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the connecting hand wheel (5) is circumferentially distributed with 4 about the central point of the top view surface of the upper tool rest (2), the connecting hand wheel (5) and the upper tool rest (2) form a rotating structure, and a transmission gear (6) on the connecting hand wheel (5) is in meshed connection with a driven gear (7).

3. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: driven gear (7) equidistant have 5 and circumference and distribute in the inside of top rest (2), and driven gear's (7) surface is connected with gear train (8) to 5 driven gear (7) all are connected for the meshing with gear train (8).

4. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the outer surfaces of the driven gear (7) and the upper tool rest (2) are penetrated through by a bolt hand wheel (9), and the bottom surface of the bolt hand wheel (9) is fixedly connected with a connecting layer (10).

5. The tool rest with the anti-pinch function for the numerical control machine tool as claimed in claim 4, wherein: the bolt hand wheel (9) is in threaded connection with the upper tool rest (2), the bolt hand wheel (9) and the driven gear (7) form a clamping sliding structure, and a connecting layer (10) on the bolt hand wheel (9) is made of a silicon rubber material.

6. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the first conical gear (11) and the second conical gear (12) are in meshed connection with the screw (13), and the screw (13) and the upper tool rest (2) form a sliding structure.

7. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the fixing blocks (14) are symmetrically distributed about the longitudinal center line of the upper tool rest (2), the lengths of the fixing blocks (14) and the blocking blocks (16) are both larger than the radius of the cooling channel (3), and the fixing blocks (14) and the blocking blocks (16) form a sliding structure with the upper tool rest (2) through the supporting rods (15).

8. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the outer surface of the connecting chain (17) is attached to the outer surface of the guide block (18), the first magnetic block (19) and the second magnetic block (24) on the connecting chain (17) form a structure with the same poles repelling each other, and the first magnetic block (19) and the upper tool rest (2) form an elastic structure through a spring (21).

9. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the square blocks (20) are distributed in an equiangular mode relative to the central point of the top view surface of the upper tool rest (2), and the square blocks (20) and the upper tool rest (2) form a sliding structure.

10. The tool rest with the anti-pinch function for the numerical control machine tool according to claim 1, characterized in that: the heat conducting rod (22), the laminating layer (4) and the metal ring (23) are all made of copper materials, and the metal ring (23) is spirally wound on the outer surface of the cooling channel (3).

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